Firstly I have researched about those words, This answer really help me understand their meanings.
So I believe that those words are singular form of You, you, your and yours respectively.
Furthermore, “Thou” is a subject form while “thee” is the object form. so could someone tell me if I can use them as following.
Who are thou? instead of Who are you?
I have come to see thee. instead of I have come to see you.
What are thy future dreams? instead of What are your future dreams?
I believe this pen is thine. instead of I believe this pen is yours.
In a comment, Janus Bahs Jacquet wrote:
Thou requires a specific form of the verb, which always ends in -((e)s)t (e.g., thou art, thou wert, thou canst, thou thinkest, etc.), so the first sentence is not grammatical. The rest are fine. Since they are so archaic, however, you should be aware that it’s frequently not just a matter of substituting one word for another – in order for it to seem natural, you’d have to emulate other grammatical features of older English as well, such as different vocabulary and inversion instead of do-support in questions (“Camest thou yestereve?” instead of “Did you come last night?”).
Source : Link , Question Author : Digvijaysinh Gohil , Answer Author : tchrist